Question about 1993 Pontiac Bonneville

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Heater blower motor works intermittently

Heat seems fine but blower motor won't come on sometimes. When it does work it works on all settings (high to low). Sometimes when you hit a bump, it will come on.

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  • holleranrich Jan 24, 2009

    Followup to problem with 93 Bonneville blower motor working intermittently.....

    Banging on the housing from the engine compartment will cause motor to kick on. Electrical or mechanical, I don't have a tester.

  • Anonymous Feb 17, 2009

    We have the same problem again with our bonneville. The first time the blower motor had worn out its brushes. Now, the connector is a bit melted. I think either the blower motors are cheap, or the mouting position is causing problems (probably a little of both). A few months ago is when the 2nd round started. I pulled the blower and the thing had a lot of carbon dust in it. I cleaned it with contact cleaner and that worked (the brushes still had life in them as they should being less than a year old). So look at you connector and the blower motor first. I would bet that you can slightly manipulate the connector and it will go. Almost forgot, the connector on our bonneville had no weatherpak in it which doesn't help keep the connector firmly in the motor's recepticle.

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I would replace the blower motor, this sounds like a motor brush problem inside the motor itself.

Posted on Jan 24, 2009

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  • Master
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You need to replace the resister block...it is located on the duct work near the fan... there are two or three bolts holding it and a connector.

Robert

Please rate this solution ... thanks

Posted on Jan 24, 2009

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